Perhaps you should try some spelling variations:
"modified stochastic optimization algorithm" » "modified stochastic optimization algorithms", "modified stochastic optimisation algorithm", "modified stochastic estimation algorithms"
"modified parameter estimation algorithm" » "modified parameter estimates algorithm", "modified parameter optimization algorithm"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified stochastic optimization algorithm\") OR (\"modified parameter estimation algorithm\"))~".
• Removing quotes may allow a broader search: (( modified stochastic optimization algorithm ) OR ( modified parameter estimation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified stochastic optimization algorithm") OR ("modified parameter estimation algorithm"))*.